James shannon



(NoMode'l.)

J. SHANNON.`

- SASH CORD GUIDE. No. 2 74,831. Patented Mar. 27, R883.

UNITED STATES PATENT OEFIcE.

JAMES SHANNON, OF WASHINGTON, DISTRICT OF GOLUMIBIA.

sAsH-coRD GUIDE.

SPECIFICATION forming part of Letters Patent No. 274,831, dated March 27', 1883.

' Application filed September 12, 1882. (No model.)

To all 'whom it may concern Beit known that I, JAMES SHANNON, of the city of Washington, in the District of Columbia, have invented certain new and useful Improvements in Guides for Sash and other Cords, of which thefollowing is a specification.

It is well known that frequently, by reason of im proper arrangement relatively of the size of the weight box or channel and the weight itself, and of the limit of projection within the box ofthe periphery of the sheave or pulley, a side ofthe weight will strike against a side of the box, producing unnecessary noise and wear.

The object of my invention is to' produce a guide for cords of the description named which will admit-of the necessary adjustment whereby the weight and box may be kept from contact. The invention is applicable to window-sash, dumb-waiters, elevators, and in any relation in which a weight traverses a box or channel.

The drawing represents a; side view of the invention in its preferred form.

A is the support for the sheave or pulley B. The pin or axis a. rests in holes or bearings drilled or formed in the sides or brackets of the support. In order to permit of the lateral a ljustment ofthe sheave, additional holes, b b,

are placed at either side ofthe central hole, to which the axis may he transferred when the distance of projection of the sheave within the box is to be altered, to cause a side ofthe weight to clear a side of the'box. The number of the pin-holesm'ay be varied, and I do not ,i

limit my invention to any particular number.

It is apparent that vertical or other slots may be used, instead of holes, as bearings for the pin or axis, and that these may be used without a departure from my invention, the principle of which consists-in providing a support With bearings which admit of lateral adjustment of the sheave.

This invention is found to supply a Want in the trade, as 4it is not ordinarily practicable to make the size ofthe box, the size ofthe weight, and the limit of projection of the sheave within .the box agree with such accuracy as to prevent the contact of the box and weight. My invention prevents the necessity of accurate measurement of the parts, and in practical use is found convenient and to cheapen the work of arranging the weights.

I claim as my inventionj A guide for sash or other cords, consisting of a sheave, removable axis, and a support,

with a series of bearings, to any one of which i the axis may be adjusted,-substantially as and for the purpose set forth.

In testimony whereof I have hereunto subscribed my name in the presence oi' two witnesses.

JAMES SHANNON.

Witnesses:

GEORGE H. HOWARD, W. T. COLE. 

